Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have.
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Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have. |
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Tire Pressure Guage
MIESER ACCUGAUGEWe've sold several types of pressure gauges over the years but the best we've sold has been the Accugauge. The Accugauge actually measures the difference between the air under pressure supplied to it, and the gauge's outer atmospheric pressure, to deliver a highly accurate reading of the difference between the actual outer barometric pressure and the rise of pressure internally through the gauge. The difference is displayed on a dial by a needle in PSI or Bar. (barometric atmospheres). Cheaper pencil type gauges merely read pressure against an inner spring, in essence measuring air resistance against a spring resistance rather than the difference between inner and outer atmospheres. The spring type gauges rely on the quality of the spring for their accuracy. We've also looked at modestly priced digital gauges and not found them as accurate, even though they cost more. The probable reason is that they are trying to convert an analog pressure reading, from a spring or pressure transducer, into digital information. Their reliance on the quality of the spring or transducer may introduce some error or possibly the A to D converter doesn't fully compensate for outer barometric pressure. At the very least the digital gauges seem to over complicate what should be a simple matter. The gauge reads up to 160 PSI or 11 barometric atmospheres. There are two versions of the Accugauge, one gives a momentary reading of the pressure until the gauge is pulled away from the valve stem, the other has a small reservoir and a releasable check valve so that it can read the inner tube's air pressure and hold it internally so you can take the gauge off the valve to read it. Pressing a small button at the base of the machined brass extension releases the pressure from the gauge it so can take a new reading. Both the holding and non-holding Accugauge come with either a Presta or Schraeder air chuck which you will have to specify at time of ordering. The Schraeder gauge will read accurately the pressure of a Presta tube, if you use a Presta to Schraeder adapter. Just under three inches long the holding Accugauge weighs 95.5 grams, while the non-holding weighs 59 grams. Non-Holding Accugauge - Schraeder valve $ Price in Catalog |
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In-depth Information About Metals Aluminum Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article... Beryllium Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size. Until the 1950's beryllium was used read the full article... Titanium The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article... Metallurgic Hardness Testing There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article... |
